Single Atoms Preparation Using Light-Assisted Collisions

Fung, Y. H.; Sompet, Pimonpan; Andersen, Mikkel F.

doi:10.3390/technologies4010004

Cited by 7 publications

(5 citation statements)

References 62 publications

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“…This clearly exceeds the classical percolation threshold (indicating the transition to long-range connectivity) for a 2D triangular lattice expected for an occupation probability of 0.5. It is also close to the state-of-the-art in single-atom preparation in optical microtraps using lightassisted collisions, where efficiencies up to 90% have re- cently been achieved [35]. Furthermore, the fall-off of the efficiency with n for high n is slow, e.g., the efficiency at n = 60 is still 80%.…”

Section: Initialisation Of Collective Spin Statessupporting

confidence: 71%

Simulating quantum spin models using Rydberg-excited atomic ensembles in magnetic microtrap arrays

Whitlock

Glaetzle

Hannaford

2017

J. Phys. B: At. Mol. Opt. Phys.

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We propose a scheme to simulate lattice spin models based on strong and long-range interacting Rydberg atoms stored in a large-spacing array of magnetic microtraps. Each spin is encoded in a collective spin state involving a single nP Rydberg atom excited from an ensemble of groundstate alkali atoms prepared via Rydberg blockade. After the excitation laser is switched off the Rydberg spin states on neighbouring lattice sites interact via general isotropic or anisotropic spinspin interactions. To read out the collective spin states we propose a single Rydberg atom triggered avalanche scheme in which the presence of a single Rydberg atom conditionally transfers a large number of ground-state atoms in the trap to an untrapped state which can be readily detected by site-resolved absorption imaging. Such a quantum simulator should allow the study of quantum spin systems in almost arbitrary two-dimensional configurations. This paves the way towards engineering exotic spin models, such as spin models based on triangular-symmetry lattices which can give rise to frustrated-spin magnetism. * whitlock@uni-heidelberg.de †

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Section: Initialisation Of Collective Spin Statessupporting

confidence: 71%

Simulating quantum spin models using Rydberg-excited atomic ensembles in magnetic microtrap arrays

Whitlock

Glaetzle

Hannaford

2017

J. Phys. B: At. Mol. Opt. Phys.

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“…The number of atoms in the trap is limited to either zero or one by the collisional blockade mechanism [9,25]: when pairs of rubidium atoms collide in the presence of red-detuned cooling light, they can be photoexcited to form a molecule and are lost from the trap. This is confirmed in figure 2(c), which shows a negligible probability of observing two atoms.…”

Section: Trapping and Imaging Single Atomsmentioning

confidence: 99%

Single-atom trapping and transport in DMD-controlled optical tweezers

Stuart

Kuhn

2018

New J. Phys.

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We demonstrate the trapping and manipulation of single neutral atoms in reconfigurable arrays of optical tweezers. Our approach offers unparalleled speed by using a Texas instruments digital micromirror device as a holographic amplitude modulator with a frame rate of 20 000 per second. We show the trapping of static arrays of up to 20 atoms, as well as transport of individually selected atoms over a distance of 25 μm with laser cooling and 4 μm without. We discuss the limitations of the technique and the scope for technical improvements.

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“…1 This light creates an interaction between two rubidium atoms which transfers enough energy to the atom pair for exactly one atom to get ejected from the tweezer. 10 Specifically, the light is blue-detuned by 85 MHz from the D1-transition in rubidium-85 and produces an unstable Rb 2 molecule, 10 which upon decay transfers the required energy to the atoms. This process continues until there is only one atom left, at which point atom ejection stops because no atom pair is present.…”

Section: Atom Preparationmentioning

confidence: 99%